import java.util.Scanner;
public class Example2_3{
     public static void main (String args[])
{
     System.out.println("请输入若干个数，每输入一个数回车确认");
     System.out.println("最后输入数字0结束输入操作");
     Scanner reader = new Scanner(System.in);
     double sum=0;
     double x=reader.nextDouble();
     while(x!=0){
       sum=sum+x;
       x=reader.nextDouble();
    }
     System.out.println("sum="+sum);
}
}     

